Essays Tagged: "DNA"

DNA

DNADeoxyribonucleic acid and ribonucleic acid are two chemical substances involved in transmitting g ... It was known early into the 20th century that chromosomes, the geneticmaterial of cells, contained DNA. In 1944, Oswald T. Avery, Colin M. MacLeod, and Maclyn McCartyconcluded that DNA was the basic ... tic component of chromosomes. Later, RNA would be proven toregulate protein synthesis. (Miller, 139)DNA is the genetic material found in most viruses and in all cellular organisms. Some viruses do not ...

(5 pages) 194 0 4.0 Jan/1996

Subjects: Science Essays > Genetics & Genome Projects

HYPERCELL / CELL DIVISION

the reproduction of a pair of two daughter cells that are genetically identical. For this to occur, DNA must be duplicated and its products segregated into the nuclear spaces of the two daughter cells ... and the environment conditions are favorable in the G1 checkpoint (START or Restriction point), the DNA replication machinery is triggered and the control system moves forward. Similarly for the G2 ch ...

(5 pages) 76 0 4.0 Jan/1997

Subjects: Science Essays > Biology

HYPERCELL / CELL DIVISION

the reproduction of a pair of two daughter cells that are genetically identical. For this to occur, DNA must be duplicated and its products segregated into the nuclear spaces of the two daughter cells ... and the environment conditions are favorable in the G1 checkpoint (START or Restriction point), the DNA replication machinery is triggered and the control system moves forward. Similarly for the G2 ch ...

(5 pages) 88 0 4.6 Jan/1997

Subjects: Science Essays > Biology

Biotechnology

that genetic engineering could be unsafe.Genetic engineering is used to take genes and segments of DNA from one species and put them into another species. Genetical Engineering provides a set of tech ... pecies and put them into another species. Genetical Engineering provides a set of techniques to cut DNA either randomly or at a number of specific sites. Once isolated one can study the different segm ...

(3 pages) 203 0 4.6 Mar/2002

Subjects: Science Essays > Biotechnology

Human Cloning Should Not Be Banned.

ning Should Not Be Banned.The news of the successful cloning of an adult sheep, in which the sheeps DNA was inserted into an unfertilized sheep egg to produce a lamb with identical DNA, has generated ... of a living organism. In 1952 deoxyribonucleic acid was discovered, the spiral staircase molecule, DNA. DNA is the building block of life. This block holds the code for every aspect of any life on th ...

(12 pages) 707 3 4.3 Mar/2002

Subjects: Science Essays > Genetics & Genome Projects

Should genetic engineering be banned?

ad openly than for governments to try to ban such research altogether.GE is quite a recent science. DNA, the basic material that determines genes, was discovered in 1953 (the discovery was announced i ... cists learned that each human cell contains 46 chromosomes' (Lipkin and Rowley, p. 4). 'Recombinant DNA' - which makes it possible to actually change or modify genes - was not discovered until 1973 (H ...

(6 pages) 313 0 3.6 Apr/2002

Subjects: Science Essays > Biology

Cloning

ividuals bytransplanting whole cell nuclei. With other techniques scientists can isolatesections of DNA representing single genes, determine their nucleotidesequences, and reproduce them in the labora ...

(2 pages) 57 0 3.3 Jan/1996

Subjects: Science Essays > Genetics & Genome Projects

Cloning

ividuals bytransplanting whole cell nuclei. With other techniques scientists can isolatesections of DNA representing single genes, determine their nucleotidesequences, and reproduce them in the labora ...

(2 pages) 72 0 3.0 Dec/1995

Subjects: Science Essays > Genetics & Genome Projects

Genetic Engineering

reality.In 1952, deoxyribonucleic acid was discovered(Dewitt, 1994). The spiral staircase molecule, DNA. DNA is the building block of life. This block holds the code for every aspect of any life on th ... building block of life. This block holds the code for every aspect of any life on the planet Earth. DNA decides whether one life will be a plant or rhinoceros. DNA also carries the information that te ...

(3 pages) 92 1 4.4 Mar/1996

Subjects: Science Essays > Genetics & Genome Projects

Designer Babies

, no one is in control of what may happen. For example, scientists can now tell you by testing your DNA what defective genes you carry. Every day they are finding more and more genes that can be linke ... a few years. It has even been suggested that in five to ten years scientists may be able to detect DNA patterns that correlate with higher intelligence. What is scary is that this is something everyb ...

(5 pages) 91 0 3.5 May/2002

Subjects: Science Essays > Genetics & Genome Projects

Essay on Thought Contagion. Explains Thought Contagion and examples of how MEMES effect the mind. Teacher of class was very impressed.

h genes: the biological code-carriers that program our corporal body by amino acid sequences in our DNA. Genes are the element of heredity that forms the base for the pattern of all life. But did you ... here evolution occurs, not environmental influence and the random mutation of individual strands of DNA leading to a mutated individual and then the spreading of the gene to other individuals in the p ...

(14 pages) 171 1 4.9 May/2002

Subjects: Science Essays > Mental Health

Sporting With Life, Frankenstein and Science Today

structiveness of nuclear power, the morality of organ transplants, the possible uses and misuses of DNA, and the wonder and fear created by the space exploration program - just to cite some clear exam ...

(9 pages) 150 0 5.0 Oct/1996

Subjects: Literature Research Papers > European Literature

Describe the biological explanation of crime. Identify key aspects of crime that are hard to explain in this way.

g genes and how they work has been deeply explored giving us an insight into the structure known as DNA and how we inherit certain characteristics and biological structures from our parents.This has l ...

(4 pages) 125 0 4.3 Aug/2002

Subjects: Social Science Essays > Society and community

Human Cloning isn't as scary as it sounds

Scary as It SoundsThe recent news of the successful cloning of an adult sheep--in which thesheep's DNA was inserted into an unfertilized sheep egg to produce a lambwith identical DNA--has generated a ...

(5 pages) 128 0 3.7 Mar/1997

Subjects: Social Science Essays > Controversial Issues

Biotechnology

antageof many people. We have learned that with certain chemicals, we are able to cut-and-paste the DNA of certain organisms, and alter them to comply to oursociable needs. But this can also affect mo ... which allows the patient to healfrom wounds. Scientists may now insert a gene into the patients own DNAcausing the patient to heal skin, which has been impossible until now, withGenetic-Engineering. I ...

(3 pages) 67 0 3.5 Oct/1995

Subjects: Science Essays > Biotechnology

SHOULD CONGRESS BAN EMBRYONIC CLONING? August 2002

hat have the potential to turn into any type of cell in the body. Theoretically, if the persons own DNA was used to make an embryo, stem cells could be extracted and used to grow whatever cells or tis ...

(4 pages) 126 0 3.8 Sep/2002

Subjects: Science Essays > Biotechnology

DNA

Research paper about DNA and Genetics "Excellent."DNA: The MakingLyle SykesFor more than 50 years after the science of ge ... 1944, however, the Canadian bacteriologist Oswald Theodore Avery proved that deoxyribonucleic acid (DNA) performed this role. He extracted DNA from one strain of bacteria and introduced it into anothe ... ly acquired characteristics of the first but passed them on to subsequent generations. By this time DNA was known to be made up of substances called nucleotides. Each nucleotide consists of a phosphat ...

(8 pages) 172 0 3.3 Mar/1997

Subjects: Science Essays > Genetics & Genome Projects

All about cancer.

pproximately every million divisions, a daughter cell splits off with an altered genetic code. When DNA duplicates with some mistakes, and it happens at the right time, the cell doesn't die, it mutate ...

(8 pages) 170 0 3.2 Oct/2002

Subjects: Science Essays > Biology

Cloning of animals

ould be manipulated in such a way as to produce a genetically identical copy of the animal that the DNA was acquired.Scientist long believed that once a cell became differentiated, that most of its ap ...

(2 pages) 30 0 2.6 Mar/1997

Subjects: Science Essays > Genetics & Genome Projects

Albinism

es of oculocutaneous albinism, and five types of ocular albinism. Newerlaboratory research studying DNA has shown that there are numerous types of changes inthe genes of those with albinism, including ... not function. The test uses a sample of blood to identifythe gene for the tryrosinase enzyme by its DNA code. A similar test can identify ty-negative or similar albinism in unborn babies, by aminiocen ...

(2 pages) 35 0 3.0 Mar/1997

Subjects: Science Essays > Biology